Full-stroke mechanism for calculating-machines.



0. THIEME. PULL STROKE MEGHANISM PoR oALoULATIv-NG MACHINES APPLICATION FILED APR.10,1911.

Patented June 20, 1911.

/M/NTOR OTTO THIEME y a full, clear,

,TED Smm@ @maar carica.

or'ro THIEME, or sr. Louis,

MSSOUL' ASSEGNOR T0 lVON-HPKINS BILLING MACHINE COMPANY, 0F ST. LOUIS,

,MISSOURL A CORPGRATIONQ FULL-STROKE MECHANISM FOR CALCULAIING-MACHNES.

To all 'it may concern:

Be it known that lI, OTTO THIEME, a citizen of the United States, residing at 3730 Wyoming street, St. Louis, Missouri, have invented a certain new and useful Improvement in Full-Stroke. Mechanism for Calculating-Machines, of which the following is and exact description, such 6as lwill enable others skilled in the art to which it appertains to' make and use the same, ref erence bein had to the accompanying draw--` ings, forming part of this specification, in which v Figure 1 is a side elevational view of my improved fullstroke mechanism. Fig. 2 is a top plan view of the same. 'F ig. 3 is a front elevational view partly in section.

This invention relates to a full stroke mechanism for calculating machines, the obvject being to construct mechanism ofthe character described, so that the operating handle when once startedon its stroke in either direction will loe locked against any return movement before said stroke is coinpleted.

One of the features ofvmy invention is the provision ofmeans wherebythe double pawl which coperates with the notches in the rocking element will not` ratch it over said element, being held free therefrom by means of a friction device, which friction device is so related' to the double pawl that it will, upon the reverse movement of said rocking element move the active pawl into engage- -ment with the rocking element and prevent such reversey movement.

This present. application is a division of an application serially numbered 607,084,

filed by me February 7th', 1911.

The shaft 36 on which-the' cams 35 are mounted has a rock-arm 102 pinned thereto (see Fig. 3)', to which isy connected a link i' 103 (see Fig. 2), the rear end of said link being slotted and guided upon a screw 104 carried by a bracket 105 (see Fig-1)..

106 indicates a spring arranged upon a` pin at the rear end of link 103, the forward end of said spring being connected to a pin 107 mounted in the quadrant'plate 108, which pin 1.07 extends through said quadrant plate and provides a mount for a 109. The quadrant 108 is connectedto a notched segment 110 constituting a part of the full-stroke mechanism to be hereinafter Specication of Letters Patent.

Original application led February 7,1911, Serial No. 6072034. lDivided 1911. Serial No. 620,185.

, end of sleeve 111 is spring-v Patented June 20, 1911..

described, which notched segment is secured to a sleeve or head 111 mounted in one of the .side frames and in a bracket-bearing 2a secured thereto as shown in Fig. 3. The

hft 36 finds a loose-bearing in this sleeve 112 indicates a short stud-shaft extending from the hub of the handle 37, said shaft having a V-shaped notch 112a formed near its inner end in which fits a plunger 113 held inwardly by a spring 114. The outer jections 111B, whose edges are beveled slightly, these projections coperating with projections 112b on the hub of the handle. The inner end of the stud-shaft ofthe handle is slightly beveled, as shown, so that when it is placed in position it will force provided with two proand this application filed April A10, I

the Pin 113 upwardly, said pin finding a seat in the recess 112 when the handle is home, and tending to hold the same against outward displacement.

The projections' 111a and 112b coperate with each other so that,- when the handle is pulled forward, it is instantly locked to the sleeve 111, but when the handle is moved rearwardly, if it should be carried beyond its intended stroke the cam faces of the projections 111a and 112bvwill force the handle outwardly soas to disengage it from the sleeve 111. in this manner, no injury can be done to the machine by too quick a return of the handle.' It will be noticed that the lugs 111a and 112b'are spaced apart suliciently to give the handle a slight movement rearwardly before the lugs contact with each other, and this slight movement is sufficient to enable the pin 113 to ride out of its notch so as to permit the disengaging movement of t-he handle.

The handle is positively locked'to thecommunicating motion to the machine. A lug 108il on the quadrant plate strikes a rub bei' or leather plug in the upper end of'a post 1f and limits the forward movement-of the handle.

.The full stroke mecam'sm.-The notched segment hereinbefore referred to as constituting a part of the full-stroke mechanism, is positively operated by the handle at each stroke. There are mounted upon the shaft 36 so as to move with this notched segmentin the normal operation of the machine, two arms 115 and 11G. These arms normally cooperate with a double pawl 116 piovted at 11'?- and whose forward extension is beveled so as to cooperate with a spring-pressed holding plug 118. This plug is mounted upon a leaf spring, as shown, and when the parts are. in the position shown in Fig. 1 and the handle is ready to be pulled forward, the double paw] 11Ga will be held in a position to fall into the notches of the notched segment and prevent any backward movement of thc handle until the handle has completed its forward stroke. As the handle completes its forward stroke, the arm 115 strikes a pin 119 carried by the double pawl and reverses the position of said pawl so that the apex of its forward end will be placed above the plug 118, and the upper end of the pawl will now be in a position to drop into the notches of the plate 110 in the event that itl should be attempted to pull the lhandle forward before 'it has completed its rearward stroke.

To ayoid the rattling noise of the double pawl riding over the notched periphery of the plate 110, 1 mount a spring 120 on the double pawl whose free end engages the side face of the segment 110 ufhereby su'licient friction is produced on the spring to tend -to rockt-he double pawl and hold 1t out of convtact with the periphery of the plate 110. 1f,

however, the movement of the handle should be reversed, this friction throws the double pawl 'into engagement. This friction spring acts in both positions of the double Apawl to hold either the upper or the lower pawl out ot' contact with the edge or plate 110, and thus the rattling of the pawls riding over the notches is prevented. When the` n position of said pawl, -rneans vfor holding the pawl in its reversed position, and a frictional element carried by the pawl and cooperating with said segment to hold the activeM pawl out of engagement with said notched segment.

2. 1n a calculating machine, the combina? tion of an operating handle, a notched segment carried thereby, a double pawl coL operating with said segment, means for rever-sing the position of said segment, and a friction device carried by said double pawl and cooperating with said segment.

3. In a calculating machine, the combination of a handle', a notched segmentcarried thereby, a double` pawl cooperating therewith, and a yielding friction element carried by said double pawl and cooperating with said segment. y l f In testimony whereof Ihereunto affix my signature in the presence of two witnesses, this 8th day of April, 1911. y

OTT() THIEME. litnesses l M. I. SMITH E. M. HARRINGTON. 

